ISSN: 0090-3973
Page Count: 6

Leaching Behavior of Indian Fly Ashes by an Oedometer Method

Pandian, NS
Professorresearch scholar,Indian Institute of Science,

Balasubramonian, S
Professorresearch scholar,Indian Institute of Science,

(Received 3 November 1999; accepted 16 May 2000)

Abstract

Thermal power stations use pulverized coal as fuel, producing enormous quantities of ash as a by-product of combustion. Currently, with very low utilization of the ash produced, the ash deposits at the thermal power stations are increasing rapidly. The disposal problem is expected to become alarming due to the limited space available for ash disposal near most thermal power stations. Among the various applications available for the use of fly ash, geotechnical application offers opportunity for its bulk utilization. However, the possibility of ground and surface water contamination due to the leaching of toxic elements present in the fly ash needs to be addressed. This paper describes a study carried out on two Indian fly ashes. It is found that pH is the controlling factor in the leaching behavior of fly ashes.

Keywords:
leaching, trace metals, free lime, fly ash

Paper ID: JTE12128J
DOI: 10.1520/JTE12128J
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